FILE - In this Friday, Nov. 30, 2012 file photo, officials work the scene of derailed freight train tank cars in Paulsboro, N.J. Residents of Paulsboro were ordered to stay inside and s

 

              FILE - In this Friday, Nov. 30, 2012 file photo, officials work the scene of derailed freight train tank cars in Paulsboro, N.J. Residents of Paulsboro were ordered to stay inside and s
FILE - In this Friday, Nov. 30, 2012 file photo, officials work the scene of derailed freight train tank cars in Paulsboro, N.J. Residents of Paulsboro were ordered to stay inside and schools were closed Monday, Dec. 3, 2012, after unsafe levels of the chemical vinyl chloride were found in the air near where the train derailed last week. (AP Photo/Mel Evans, File)